A polynomial time algorithm was presented to perform the coding with {O,I} coefficients for router (relay) nodes.
They also analyzed the required time slots for data transmissions between the sender node and the receiver node using their network coding scheme with 1 + 1 and 1 +N protection schemes.
In [9], the authors surveyed the different
classes of survivability mechanisms like proactive protection,
reactive protection, hybrid methods and network coding based
mechanism.